Boundary causeway structure for reclamation

Abstract

The utility model discloses a boundary causeway structure for reclamation. The boundary causeway structure comprises a causeway body, an inner slope structure and an outer slope structure. The embankment body forms a trapezoidal embankment core by throwing and filling block stones; the inner slope structure adopts an inverted filter slope protection; the outer slope structure comprises an upper side outer slope, a lower side outer slope and a berm arranged between the upper side outer slope and the lower side outer slope; the outer slope on the upper side adopts ecological slope protection; the lower side outer slope adopts a throwing and filling block stone protection slope, the block stone protection slope is smoothly cut off to the position where the sea red line is used along the gradient of 1: 1.5 to form an outer slope footing, the elevation of the outer slope footing is higher than that of the original seabed surface, and a prefabricated bottom protection check block is arranged between the bottom of the outer slope footing and the original seabed surface; each bottom protection check block is in a horizontal I shape and comprises an inner wing plate, an outer wing plate and a web plate; bosses and grooves are arranged at the two ends of each outer wing plate in a one-to-one correspondence mode, so that the outer wing plates of the adjacent bottom protection check blocks are connected in a clamped mode through the bosses and the grooves. On the premise that the structural strength is met, the problems that the causeway shrinks inwards, and the land forming area is reduced are effectively solved.

Description

Technical Field

[0001] The utility model relates to a boundary dike structure for sea reclamation. Background Art

[0002] The structure of the boundary dike must have sufficient stability, impermeability, impact resistance and certain strength, so the cross section of the boundary dike is usually made into a trapezoidal shape with narrow top and wide bottom. When faced with the situation of limited sea use and avoiding the shrinkage of the dike and the reduction of the land area, how to meet the structural strength of the boundary dike is an urgent problem to be solved by engineering and technical personnel. Utility Model Content

[0003] The utility model aims to overcome the defects of the prior art and provide a boundary dike structure for land reclamation, which can effectively avoid the problems of dike shrinkage and land area reduction under the premise of meeting the structural strength of the boundary dike.

[0004] The purpose of the utility model is achieved as follows: a boundary dike structure for land reclamation, comprising a dike body, an inner slope structure and an outer slope structure; wherein:

[0005] The embankment is formed of a trapezoidal embankment core with inner and outer slopes by dumping and filling blocks, and the top surface of the embankment is paved with a mud-bound crushed stone surface layer; the outer edge of the top surface of the embankment is fixed with cast-in-place concrete to press the top; the elevation of the embankment is higher than the backfill elevation of the land area;

[0006] The inner slope has a slope of 1:1.5; the inner slope structure adopts an inverted filter layer for slope protection and includes two stone cushion layers, a mixed crushed stone inverted filter layer, a short-fiber needle-punched non-woven geotextile and bagged sand laid in sequence from bottom to top;

[0007] The outer slope has a slope of 1:1.5; the outer slope structure includes an upper outer slope, a lower outer slope and a ridge between the upper outer slope and the lower outer slope; wherein the upper outer slope adopts an ecological slope protection, which includes two stone cushion layers, a gravel layer and several rows of ecological frames arranged in a stepped manner, which are laid from bottom to top; a footing is arranged at the bottom of the upper outer slope; the lower outer slope adopts a dumped block stone slope protection, which is smoothly sloped along the slope of 1:1.5 to the sea red line to form the outer slope footing, and the elevation of the outer slope footing is higher than the elevation of the original seabed surface. , and a layer of prefabricated concrete bottom protection block is arranged between the bottom of the outer slope foot and the original seabed surface; each bottom protection block is in a lying I-shape and includes an inner wing plate, an outer wing plate and a web plate; the length and width of the outer wing plate are respectively greater than the length and width of the inner wing plate, and the bottom of the outer wing plate is flush with the bottom of the inner wing plate; the width of the web plate is the same as that of the inner wing plate and is connected between the outer side surface of the inner wing plate and the inner side surface of the outer wing plate; bosses and grooves are respectively arranged at both ends of the outer wing plate, so that the outer wing plates of adjacent bottom protection blocks are clamped through the bosses and grooves.

[0008] In the above-mentioned boundary dike structure for reclamation, each row of eco-frames is composed of multiple eco-frames arranged side by side, the thickness of each row of eco-frames is 0.8m, the next row of eco-frames is arranged 0.5m lower than the top of the previous row of eco-frames, and the multiple eco-frames in adjacent rows of eco-frames are staggered and arranged in a herringbone shape.

[0009] In the above-mentioned boundary dike structure for land reclamation, rocks are backfilled between the webs of adjacent bottom protection blocks.

[0010] In the above-mentioned boundary dike structure for land reclamation, a crushed stone leveling layer is laid between the bottom of the bottom protection block and the original seabed surface.

[0011] The boundary dike structure of the utility model for reclamation is characterized by:

[0012] 1. Set up an inverted filter layer on the inner slope to prevent the loss of backfill soil in the embankment, maintain the stability and firmness of the embankment, and at the same time drain water to prevent water from accumulating in the embankment, reduce soil liquefaction and softening in the embankment, thereby improving the bearing capacity of the embankment;

[0013] 2. By setting up a platform on the outer slope of the embankment, it is not only used to stabilize the outer slope and prevent the embankment from sliding or becoming unstable due to height differences, but also serves as an inspection path, a traffic path, and meets the needs of construction, observation, maintenance and transportation.

[0014] 3. The upper outer slope of the embankment adopts a stepped ecological slope protection, which can not only alleviate the impact of waves and reduce the cross-sectional size of the embankment, but also realize ecological bank protection.

[0015] 4. The lower outer slope of the embankment is smoothed along the slope to the sea red line to form the outer slope footing, so that the lower outer slope does not extend to the original seabed surface outside the sea red line, and a prefabricated concrete bottom protection block is set at the bottom of the outer slope footing. It not only does not affect the structural strength of the embankment, but also effectively avoids the problem of embankment shrinkage and reduction of land area while meeting the structural strength of the embankment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the boundary dike structure for land reclamation of the utility model;

[0017] Figure 2 yes Figure 1 A view in the figure. DETAILED DESCRIPTION

[0018] The utility model will be further described below in conjunction with the accompanying drawings.

[0019] See also Figure 1 and Figure 2The utility model discloses a boundary dike structure for land reclamation, comprising a dike body, an inner slope structure and an outer slope structure.

[0020] The embankment body is formed by dumping blocks of stone into a trapezoidal embankment core 10 with an inner slope and an outer slope, and the top surface of the embankment body is paved with a mud-bonded crushed stone surface layer 11; the elevation of the embankment body is higher than the backfill elevation of the land; the outer edge of the top surface of the embankment body is fixed with a cast-in-place concrete cap 12, and a protective railing 13 is also provided on the top surface of the cast-in-place concrete cap 12.

[0021] The slope of the inner slope is 1:1.5; the inner slope structure 2 adopts a filter layer for slope protection and includes two stone cushion layers 21 with a thickness of ≥400mm, a mixed crushed stone filter layer 22 with a thickness of ≥600mm, a staple needle-punched non-woven geotextile 23 and bagged sand 24 with a thickness of 300mm, which are laid in sequence from bottom to top; the mixed crushed stone filter layer 22 adopts mixed crushed stone with a particle size of 5 to 100mm;

[0022] The slope of the outer slope is 1:1.5; the outer slope structure includes an upper outer slope 3A, a lower outer slope 3B and a support platform 30 disposed between the upper outer slope 3A and the lower outer slope 3B; wherein,

[0023] The upper outer slope 3A adopts ecological slope protection, which includes two stone cushion layers 31 with a thickness of 400mm, a crushed stone layer 32 with a thickness of 400mm and several rows of ecological frames 33 with a thickness of 800mm arranged in a stepped manner from bottom to top; each row of ecological frames is composed of multiple ecological frames arranged side by side, and the thickness of each row of ecological frames is 0.8m. The next row of ecological frames is arranged in a manner that is 0.5m lower than the top of the previous row of ecological frames, and multiple ecological frames 33 of adjacent rows of ecological frames are staggered and arranged in a triangular shape. Each ecological frame 33 is backfilled with planting soil and planted with grass 330; C30 plain concrete footing 34 is also set at the bottom of the upper outer slope 3A;

[0024] The lower outer slope 3B adopts dumped block stone slope protection, and the lower outer slope 3B is smoothly cut along the slope of 1:1.5 to the sea red line to form the outer slope footing 35, the elevation of the outer slope footing 35 is higher than the elevation of the original seabed surface, so that the lower outer slope 3B does not extend to the original seabed surface outside the sea red line, and a layer of prefabricated concrete bottom protection block 4 is arranged between the bottom of the outer slope footing 35 and the original seabed surface, and a 300mm thick crushed stone leveling layer 40 is laid between the bottom of the bottom protection block 4 and the original seabed surface; the section with a deeper original seabed silt layer can be laid with a 300mm thick crushed stone leveling layer 40 after strong tamping replacement; each bottom protection block 4 is lying down The bottom protection block 4 is an I-shaped block and includes an inner wing plate 41, an outer wing plate 42 and a web plate 43; the length and width of the outer wing plate 42 are respectively greater than the length and width of the inner wing plate 41, and the bottom of the outer wing plate 42 is flush with the bottom of the inner wing plate 42; the width of the web plate 43 is the same as that of the inner wing plate 41 and is connected between the outer side surface of the inner wing plate 41 and the inner side surface of the outer wing plate 43; bosses 421 and grooves 422 are respectively provided at both ends of the outer wing plate 42, so that the outer wing plates 42 of adjacent bottom protection blocks 4 are clamped by the bosses 421 and the grooves 422; 10 to 300 kg of stone blocks are backfilled between the web plates 43 of adjacent bottom protection blocks 4.

[0025] In a specific embodiment, the embankment body is formed by dumping 10-300kg of rocks to form the embankment core, the embankment body elevation is 9m, and the land backfill elevation is 8.6m; the top surface width of the embankment body is 5.5m and a 500mm thick mud-bonded crushed stone surface layer 11 is laid; the width of the cast-in-place concrete top 12 is 800mm;

[0026] The outer slope structure has a platform 30 at an elevation of 6m, and a width of 3.25m. The lower outer slope 3B is protected by 100-200kg of rock blocks. The thickness of the rock blocks is 800mm.

[0027] The cut-off (outer slope foot) elevation of the lower outer slope 3B is 0.9m; the length of the outer wing plate 42 of the bottom protection block 4 is 1.5m, the width is 2.4m, and the thickness of the outer wing plate 42 is 0.35m; the length of the inner wing plate 41 is 1.3m, the width is 1.6m, and the thickness of the inner wing plate 41 is 0.3m; the thickness of the web 43 is 0.25m, and the length of the web 43 is 3.35m.

[0028] The boundary dike structure of the utility model for reclamation is constructed by excavating the original seabed silt and soft soil layers such as silty soil within the dike body, dumping 10-300kg of stone blocks to form the dike core, and the dike core is formed by combining stone dumping and tamping replacement in the sections with deeper silt layers. The original seabed silt layer at the bottom of the outer slope footing 35 is tamped and replaced to form a composite foundation to improve the bearing capacity of the foundation so that the bottom protection block 4 can be stably fixed.

[0029] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Technicians in the relevant technical field can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A boundary dike structure for land reclamation, comprising a dike body, an inner slope structure and an outer slope structure; characterized in that: The embankment is formed of a trapezoidal embankment core with inner and outer slopes by dumping and filling blocks, and the top surface of the embankment is paved with a mud-bound crushed stone surface layer; the outer edge of the top surface of the embankment is fixed with cast-in-place concrete to press the top; the elevation of the embankment is higher than the backfill elevation of the land area; The inner slope has a slope of 1:1.5; the inner slope structure adopts an inverted filter layer for slope protection and includes two stone cushion layers, a mixed crushed stone inverted filter layer, a short-fiber needle-punched non-woven geotextile and bagged sand laid in sequence from bottom to top; The outer slope has a slope of 1:1.5; the outer slope structure includes an upper outer slope, a lower outer slope and a ridge between the upper outer slope and the lower outer slope; wherein the upper outer slope adopts an ecological slope protection, which includes two stone cushion layers, a gravel layer and several rows of ecological frames arranged in a stepped manner, which are laid from bottom to top; a footing is arranged at the bottom of the upper outer slope; the lower outer slope adopts a dumped block stone slope protection, which is smoothly sloped along the slope of 1:1.5 to the sea red line to form the outer slope footing, and the elevation of the outer slope footing is higher than the elevation of the original seabed surface. , and a layer of prefabricated concrete bottom protection block is arranged between the bottom of the outer slope foot and the original seabed surface; each bottom protection block is in a lying I-shape and includes an inner wing plate, an outer wing plate and a web plate; the length and width of the outer wing plate are respectively greater than the length and width of the inner wing plate, and the bottom of the outer wing plate is flush with the bottom of the inner wing plate; the width of the web plate is the same as that of the inner wing plate and is connected between the outer side surface of the inner wing plate and the inner side surface of the outer wing plate; bosses and grooves are respectively arranged at both ends of the outer wing plate, so that the outer wing plates of adjacent bottom protection blocks are clamped through the bosses and grooves.

2. The boundary dike structure for land reclamation according to claim 1, characterized in that: Each row of eco-frames is composed of multiple eco-frames arranged side by side. The thickness of each row of eco-frames is 0.8m. The eco-frames in the next row are arranged 0.5m lower than the top of the eco-frames in the previous row, and the multiple eco-frames in adjacent rows are staggered and arranged in a herringbone shape.

3. The boundary dike structure for reclamation according to claim 1, characterized in that: The spaces between the webs of adjacent bottom protection blocks are backfilled with rocks.

4. The boundary dike structure for land reclamation according to claim 1, characterized in that: A crushed stone leveling layer is laid between the bottom of the bottom protection block and the original seabed surface.

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